Pre-600 nvidia card can't run Nvidia surround without SLI. Performance won't be that cool with only 1gb and the 460's power. I don't know your budget but you should go with a 7950/7970 or a 770. 780 if you can

Thinking about going 3 screens, all 23 inches on a GTX 460 superclocked, 1g
Will it be able to game decently? Mostly play LoL, skyrim, and some Black Ops 2.

I'd probably game on just the middle screen, idk how that works yet, but just wondering on performance.

Looking to upgrade that card soon, but for now, what do you think?

You cannot run 3 monitors on card before the 600 screen without SLI.
If you can afford and going to upgrade to a single card, try going for gtx 670 or a 780.
If you decide to SLI the 460, make sure you have enough power and the performance you will get will be around that of a gtx 660ti.

If your just going to play games on one monitor you could run two on your 460 then depending on your motherboard a third monitor off the on board graphics.

late reply but yes, this may do, idk why i didn't even think of that. the third would mostly be for browsing and documents...etc anyways.
Even so, would there be much fps loss with dual monitor on an older card such as the 460? - while gaming on 1 screen

Ive done this before with my HD6850 and Geforce FX5200.
Although the FX5200 was way too slow to get the feed from the HD6850.
Dirt 3 and Hunted Demons Forge ran great, other games not so well.

You maybe wondering why I did that when the HD6850 can already drive 3 monitors on its own.
I couldnt find a Displayport to VGA adapter anywhere at that time, so I used softTH until I got some adapters for eyefinity.